Please ask an expert to explain a few terms!
Thread Content
Digital signals, analog signals, digital quantities, pulse signals, dry contacts
This post was last edited by gydcm on 2015-8-13 at 14:24. Digital signal: generally refers to mechanical contacts, such as the contacts of relays； Analog quantity: refers to a quantity that changes continuously, such as a 4–20mA current signal ； Digital quantity: refers to information represented by high and low voltage levels, such as the signals from smart meters ； Pulse signal: It is a signal that does not change continuously; for example, vortex flow meters can output pulse signals ； Dry node: refers to a node that is not energized. I’m not sure if the explanation is accurate; please correct me.
Digital signal: quantities representing on and off, connected and disconnected； Analog quantity: a quantity that changes continuously ； Digital quantity: It has only two states, namely 1 and 0; it is sometimes also referred to as a switch quantity. Pulse signal: a pulsating signal, which belongs to alternating current signals. Dry node: a passive switch with two states, on and off.